Weighing scale



March 26, 1929. E, G. THOMAS WEIGHING SCALE Filed May 11, 1927 2 IJ I mW M 0 m a D W W Patented Mar. 26, 1929.

UNITED STATES EDXVARD THOMAS, OF TOLEDO, OHIO, ASSIGNOR TO TOLEDO SCALECOMPANY, O]?

TOLEDO, OHIO, A CORPORATION OF NEW' JERSEY.

WEIGI-IING scALn.

Application filed May 11,

This invention relates to weighing scales, and one of its principalobjects is the provision of weighing mechanism wherein the platform orcommodity-receiver is prevented from tilting during weighing movementsof the mechanism without the use of check links or other lateral thrustorpull members.

Another object of the invention is the provision of weighing mechanismhaving a commodity-receiver so supported that it is prevented fromtilting without the use of additional. links, the parts being soarranged that all the forces set up by the weight of the load and theweight of the parts of the weighing mechanism act substantiallyvertically. y i i Another object of the invention is the provision of aweighing device in which the commodity may be supported upon two loverswithout necessitating the use of coinpensating links.

Still a further object of the invention is the provision of a weighingmechanism having a commodity-receiver supported upon two levers, theconstruction being si1npie, inexpensive, and embodying a minimum numberof parts.

Other objects and advantages will be apparent from the followingdescription, in which reference is had tothe accompanying drawingsillustrating a preferred embodiment of my invention and wherein similar7 reference numerals designate similar parts throughout the severalviews.

In the drawings 2- 1 Figure I is .a vertical sectional view through ascale ofthe so-called fan type embodying my 7 invention;

Figure II is a diagrammatic view showing different positions assumed bythe levers and associated parts in certain weighing positions.

Referring to the drawings in detail, the lever mechanism of the scale issupported. upon a base plate 1 and is adapted to be enclosed within abase housing 2, the indicating mechanism being housed and supportedwithin a fan-shaped casing 3 erected upon one end of the base housing 2.A side elevational view only of the scale is shown, but it is to bevunderstood that the levers and associated mechanism are of the conventional type having pairs of load and Fulcrum pivots and the like. Thebase 1927. Serial No. 190,388.

plate 1 formed with integral upwardly projecting stands 5, the upperends thereof pivotally supportin a lever (5.

One end of the lever G is provided with knife et e pivots 7pivotallyengaging a depending arm of a spider 8, the latter suitablysupporting a commodity-receiver or platter 9. The base plate 1 isprovided w th a boss 11 having a transverse bore adapted to receive apin 12, the latter serving as a pivotal support for a member 13, theupper end of the member 13 pivotally supporting a lever One end of thelever 15 is formed with a transversely projecting tenon or stub shaft 16which forms the inner raceway for a plurality of bearing balls-17 surounded by an annular race 18. The periphery of the ball race 18 engagesthe horizontal surface of a pad 19 forming a part of the spider 8 andthus serves to support the other end of the spider. This type ofconstruction provides a suitable, lost molion connection between theparts so that the use of compensating links is avoided. The opposite endofthe lever 15 provided with a V-shaped bearing 22 whichengages a pivot23 carriedby the lever 6, the nose end of thelever (i beingequipped'with a, cone pivot engaging a conical socket in the lower endof a compression. link 25, the upper ind similarly engaging a pivotsecured to the load-counterbalaneing means. The counterbalancing andindica ing mechanism comprises a centei structure 27 suitably pivoted.upon a bracket 28 secured to the base of the scale, a pendulum 29 and anupwardly extending indicating hand 30 co-operating with a suitablygraduated chart 31 fixed in the upper part of the fanshaped housing Inthe operation of the scalethe weight of a load placed upon thecommodity-ieceiver 9 is transmitted through the medium of the levers (3and 153 to the push connection25, causing the pendulum 29 to swingoutwardly .to a Josition of balance, the iridicator simultaneouslymoving to a posi tion with respect to the chart 31 to properly indicatethe weight. of the load. It the center of mass of the load to be weighedis placed on the commodity-receiver in a vertical plane passing throughthe edges of the pivots 7, it will be apparent that the weight A of theload will be entirely transmittedto the pendulum through, the lever (3.Should the center oil mass of the load on the commodity-receiver bemoved to the left ot a the lengths of the long and short arms of thelever G are reslicctively proportional to the arms of the lever 15.

The embodiment of my invention herein shown and described is to beregarded as illustrative only, and it to be understood that theinventioi'i suscept ble to vas' tion, modification and change within thespin a scope of the subjoincd claims.

Having described my nvei'ition, l: claim:

1. In a device of the class described, in combination, weighingmechai'iisn'i comp 'sing' a platform lever, a commodity-receiver,connections between said lever and aid commodity-receiver, saidconnections ii ing; a revoluble member whereby relative motion may behad between the lever :1 :onnnodity-receiver.

r Hill a device of he class described, in combination, \veighiiip,mechanism comp ing leve and load-eounterbalzmcin nisms, acommodity-receiver, and cm a between said commodity-recci r and saillevers, one of paid connections comprising an anti-Friction revolubleelemez'it interposed between said lever and said commodityreceiver.

In a device of the class described, in combination, Weighing mechanismconiprising a base, a compression member pivo'teily secured to saidbase, a lever :ti'ilcrumed upon said compression member, means forpreventing said lever from moving out of operative position, acommodity-reeeiver, and. con nections between said lever and saidcommodity-receiver.

said compression member, a conmiodity-re.

ceiver, and connections between said comniodity-receiver and saidlevers.

In a device of the class dcsribed, in combination, weighing mechanismcomprisa plurality oi levers, load-counterlialancing' mechanism.connected to one of said ievi's, one o'lf said levers beingb'llppOl'littl noon a movable member, a coiiniio(.lit v-i'ewir and meanscomprising a i'cvoluble member for connee said commodity-re one of saidlevers. -11, in a (lOVlUt of the class described, in cmnbinntion,mechanism co11'1pri;-;- a plurality oi. levers,load-cmlnterbalancmechanism cinnected to one of said rs, one of saidlevers be' Sd[ )l )0llLQ-Ll upon a movable member, a rommodity-recoiver,means compri a revoluble member for count commodity-receiver to one ofsaid and a pi volai connection belevers and said comtween the inner ofsaid 1ii alit ,'-rece,: ver.

device ol. the class described, in

i. an reinbi: ion, weighing); mechanism compr1s- Eng lever andlead-countor-balancing mechan annmodityd'eceiver, and connections i1 antfriction revoluble membi imposed Lctiveen the unnmodity-rew ill lexiceoil. the class ilcscrilicrl, we ecnanism, including a lever, ioa 1,:rbala icing mechanism connictcd to sa 1d lever, an an" frictionrevoiublc member eai'rief bv said lever, a comm iidity-rcinectionsbetween said revoluid the commodity-receiver.

In a d alt G of the class described, in combim n, lever mechanism,load-counter balancir mec anism, a push connection beween said le andload-counteroalanci11g iechanisms, a commoi'nty rcceiver,

k sections between said lever mechanism and rei'vez', and cm ole membera" and con- EDVARD THOBIIAS.

